Perfluorooctanesulfonic acid
8.1ng/L
Each block = 4.0 ng/L federal MCL (2024)
Short answer: Two PFAS, PFOA and PFOS, are above their federal limits (2024 limits that water systems have until at least 2029 to meet); 2 more are detected with no federal limit, and everything else measured is within its reference or not detected. Summerville CPW (Sc1810003) serves 81,750 residents.
This report uses the largest, SUMMERVILLE CPW (SC1810003). Your water bill or annual water quality report names your actual supplier.
Source: EPA SDWIS 2026Q2.
Each bar is drawn in blocks of the 4.0 ng/L federal MCL (2024), so the length shows how far above it the result sits.
8.1ng/L
Each block = 4.0 ng/L federal MCL (2024)
6.2ng/L
Each block = 4.0 ng/L federal MCL (2024)
SUMMERVILLE CPW (SC1810003) (EPA PWSID SC1810003) delivers surface water to 81,750 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.
PFOS 8.1 ng/L, above the 4 ng/L limit (+5 more PFAS detected)
lead 0.3 µg/L, below the 15 µg/L action level
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
When your results arrive, read them here →
Each card names which Summerville findings its current certification covers, and which it doesn't.
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PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Summerville, PFOS 8.1 ng/L and PFOA 6.2 ng/L were measured above the 4 ng/L federal limit in EPA's 2024 testing; the lead 90th-percentile result was 0.3 µg/L against the 15 µg/L action level. SUMMERVILLE CPW (SC1810003) (PWSID SC1810003) has a Purity Score of 57/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap.
SUMMERVILLE CPW (SC1810003) (PWS ID SC1810003) is the public water system on record for Summerville, South Carolina, serving about 81,750 people. Confirm the utility on your water bill before acting on a specific finding.
Surface water (primary source of record in EPA SDWIS).
Yes. In EPA's UCMR 5 testing (2024-09-17 to 2025-06-17), PFOS was measured at 8.1 ng/L against a 4 ng/L federal limit and PFOA was measured at 6.2 ng/L against a 4 ng/L federal limit. PFBS (4.4 ng/L, below the 2,000 ng/L EPA health advisory) and PFHxA (5.9 ng/L, below the 400,000 ng/L state limit) were also detected. PFBA (5.1 ng/L) and PFPeA (6.6 ng/L) were also detected; they have no federal or state limit. Reverse osmosis and filters certified to NSF/ANSI 53 for PFOA/PFOS reduce them at the tap.
SUMMERVILLE CPW (SC1810003)'s most recent lead 90th-percentile result (2024–2026) was 0.3 µg/L, below the 15 µg/L action level. That figure comes from sampled homes; lead usually enters from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
PurityMap's current record for Summerville holds 31 findings: 2 above a reference, 3 detected within the reference, 2 detected with no limit and 24 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
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| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS) | 8.1 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluorooctanoic acid (PFOA) | 6.2 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Lead (90th percentile) | 0.3 µg/L | 15 µg/L federal action level | Below the listed reference | 2024–2026 monitoring period (still open) | Lead & Copper Rule 90th-percentile: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluorobutanesulfonic acid (PFBS) | 4.4 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluorohexanoic acid (PFHxA) | 5.9 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluorobutanoic acid (PFBA) | 5.1 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluoropentanoic acid (PFPeA) | 6.6 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-09-17 to 2025-06-17 | UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003) |
Perfluorooctanesulfonic acid (PFOS)
Perfluorobutanesulfonic acid (PFBS)
Perfluorohexanoic acid (PFHxA)
Perfluoropentanoic acid (PFPeA)
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluoropentanesulfonic acid (PFPeS)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: SUMMERVILLE CPW (SC1810003) (SC1810003)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: SUMMERVILLE CPW (SC1810003) (SC1810003)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Start with the hot-or-cold tap check. Where Summerville CPW (Sc1810003) reported something related, it's shown below.
Lead at Summerville CPW (Sc1810003): 0.3 µg/L (90th percentile, 2024–2026 monitoring period (still open)). Lead has no taste, so a taste neither shows nor rules it out.
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.